Mortising-machine



2 Sheets-Sheet 1.

. (N0 Madel.)

W. W. GREEN.

MORTISING MACHINE.

Patented Mar. 18, 1884.

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0 Iwewir u PETERS, HubLRMgn-phcr. wmwac (N0 Model.) 2 Sheets-Sheet 2. W.W. GREEN.

MORTIS-ING MACHINE.

Patented L aZ E III i lllli N. wrrcns. Phmokjumgnp'wn Waihir-gim n. c.

.UNlTiE TAES A'rnnrr rrrcno WILLIAM WV. GREEN, OF CHICAGO, ILLINOIS.

MORTISING-MACl-HNE.

SPEGIFIGATION forming part of Letters Patent No. 295,162, dated March18, 1884.

V Application filed November 20, 1883. (No model.)

1'0 ctZZ whom it may concern:

Be it known that I, WILLIAM W. GREEN, of Chicago, county of Gook,-andState of Illinois, have invented certain new and useful Improvements' ina Mortis'ing-Machine, of which the following is a full, clear, and exactdescription, that will enable others to make and use the same,referencebeing had to the accompanying drawings, forming a part of thisspecification.

This invention relates to an improvement in power mortising-machines;and it consists of an auger for boring ahole, with mortisingchiselsarranged on two sides of said anger in the same plane, which are adaptedto have an alternate reciprocating movement in a vertical plane, withreference to each other, as will be hereinafter more fully set forth indetail.

Figure l is a side elevation of ainachine embodying my improvedfeatures; Fig. 2, a front elevation of the same; Fig. 3, an 'enlargedfront View of a part of the machine; Fig. 4, a longitudinal verticalsection in the plane w m, Fig. 1; and Fig. 5 a transverse section in theplane g; y, Fig. 3.

Referring to the drawings, A represents the supporting frame-work;A,table for holding the stuii" under the mortising-tools; .48,handcranl: for raising or lowering the table to a new fixed position,according to the thickness of the material to be operated upon; and Athe foottreadle for feeding the stuff to the machine.

There is nothing new in the construction arrangement, or operation ofthe feed-table. A detailed description of the same will therefore beomitted.

The boriug-augerB is arranged in a vertical plane, the long stem 13'passing up through the socketpiecect, which provides a long bearing, andfirmly holds the anger in position and prevents the same from springingin the work. The upper end of the stem B is inclosed by the sleeve E thelowerend of which has an. annular hearing on the shoulder a of the upperend of the socket-piece (4, having the neck a, projecting upward a shortdistance on the inside of said sleeve, as shown in Fig. 4 of thedrawings. The upper end of the sleeve is provided with the band-pulley Eand the augerstem is removably secured in relation to said sleeve by theset-screws", which passes through the collar (6*. The sleeve rotateswith the auger'stem and serves to greatly stiffen and hold these partsto a true hearing. The two mortising-chisels G G are placed on each sideof the auger, and are adapted to have an alternate reciprocatingmovement, so that when one chisel is down in the mortise the companionchisel is at the highest point on the upstroke. This alternate movementprevents a heavy jar and equalizes and balances the operation andmovement of the mechanism. By the use of two ohisels both sides of themortise are elongated from the boring-auger at the same time, and thestuff can be moved in either direction for a continuation of theworkwithout having to turn the same end for end or to change thechisels. By this arrangement more than donble the amount of work can bedone in the same time than could be accomplished if but one chisel wereused. The cutting ends of the chisels may be of any desired form, andprovided with lips, if necessary, in order to fa cilitate the removalofthe chips from the mortise. The upper ends of the chisel are bent at anangle and recessed into the lower ends of the cross-heads C 0 and may beremovably secured in position in any suitable man ner.. The cross-headsare retained in position by means of the guides b b on the outer sidesand the socket-piece a on the inner sides. The lower ends of the twoconnectingrods 1% are attached to the cross-heads, while the upper endsare connected to each end of the crank arm D, which isattached to andprojects across the face of the crank-wheel D, mounted on one end of thedriving-shaft If. By this arrangement the alternate reciprocatingmovementis imparted to the mortising-chisels. The opposite end of theshaft 1) is provided with the driving-pulley D and is supported in thejourrial-boxes D D A small band-pulley, d, is

also mounted on the drivingshaft 12*, near its longitudinal center,while, running over and downward from the same is the belt 01, whichpasses underneath the companion guide-wheels cl", and from thencerunning in ahorizontal plane to and around the hand-pulley B, by whichmeans the required motion is transmitted to the boring-auger.

By this arrangement a machine is provided which is simple and durable inconstruction, easily and conveniently operated, and which will greatlyfacilitate this class of work.

Having thus described my invention, what I claim as new, and desire tosecure by Letters shoulder a and neck a and having band-p111- Patent, isley B substantially as described.

1. In a n1ortising-rnachine,the combination, 3. In a inortising-machine,the combination with a boring-auger, of the chisels C 0, arofaboring-auger havingasocket-piece, a, and

ranged on each side of said auger and adapted l cliisels O and 0, havingreciprocating crossto have an alternate reciprocating movement, heads 0'and C on each side of the socket-piece substantially as and for thepurpose set forth.

2. In a mortising-niachine, the combination i of the anger-stem, thesocket-piece a, provided on the upper end with the shoulder a and the I,neck a", and the sleeve 13, resting upon the a, substantially asdescribed. 7

WILLIAM W. GREEN. Witnesses:

L. M. FREEMAN,

V. STARRWOOD.

